Member Inner Classes

By -
Sub type of Inner Classes!!!

It is defined at the same level as the member functions, constructors and fields.

Instantiating object of the Member Inner Class :
-Create an object of the outer class.
-Using object of the outer class create object of the inner class.
-If you want to use the inner class within the class ( say inside a method ),
just create an object of the inner class there. Thats it!

When we compile the java class ( OuterClass ) which has a inner class ( InnerClass ) , two class files are created :
1. OuterClass.class
2. OuterClass$InnerClass.class

Comments

Post a Comment

Popular posts from this blog

Writing your own ejabberd Module

By -
Coming soon: What is ejabberd? What is erlang? Installation details. I will start with writing the ejabberd module first. Once you have done all the installations: sudo make sudo make install sudo ejabberdctl start sudo ejabberdctl stop You can check the status using: sudo ejabberdctl status You can locate logs at: (With default installation) /var/log/ejabberd All config related changes will be mainly done at: /etc/ejabberd/ejabberd.yml You will need a basic understanding of erlang. You can take a short crash course at: http://www.erlang.org/course/course.html This is a good reference. Go to your ejabberd-15.07/src directory. This is where you will write the hook for your ejabberd server. Create a file, say mod_changeBody.erl. Your module name and file name should be same. Add the following basic contents into your erl file: -module(mod_changeBody). -behavior(gen_mod). -include("ejabberd.hrl"). -include("logger.hrl"). -expo...
Read more

npm ECONNREFUSED error

By -
If you face error which says ECONNREFUSED while doing npm install <<package name>>, you are probably behind a proxy which is not allowing you to connect to the server and download the packages required. Just follow the below steps: npm config set proxy  http://your_proxy_name:port npm config set https-proxy https://your_proxy_name:port And then try npm install How to get npm config? npm get proxy will do the work :)
Read more

Conditional Flow - Spring Batch Part 6

By -
Jump to Conditional Flow using Custom Status There can be muliple scenario where you want your jobs to proceed depending on the outcome of your steps. For example, in case of our Corporate gifts shop, in case the automatic packaging of the gifts fails, we want some manual intervention to be done i.e. somebody should manually package the item.  IF-ELSE IF loop for packaging:     if packageStep fails                              then manualPackageStep                         else if packageStep executes successfully                              then sendOutForDelivery Entire code available at git repo:   https://github.com/ricsr/spring-batch-demo/tree/exercise_06 Using SpringBatch you can achieve it as follows: Create you manualPacka...
Read more